L-Lysine
This is what the ingredient is.
L-Lysine is an essential amino acid that humans must obtain from diet, important for protein synthesis.
Here is why it shows up on the label.
Used for protein fortification in foods, particularly cereal grains which are low in lysine. Also sold as supplement.
Here is what food agencies say.
The FDA lists it as Generally Recognized as Safe. European food agencies allow it. for fortification. It is permitted in many countries worldwide.
Here is what research has found.
Essential nutrient. WHO recommends for cereal fortification in some regions. Studies support safety.
Here are a few things worth knowing.
Generally safe. Very high doses may cause GI upset. May interact with calcium absorption.
Sources
- FDA CFR 21
- WHO Fortification Guidelines
- EFSA Scientific Opinion
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.